The ACH-47A Chinook "Guns-A-Go-Go", with a crew of eight, was armed with up to five M2 .50 Cal. or M60D 7.62mm machine guns (four XM32 window and one XM33 ramp mounted), and two fixed-mounted XM34 M24A1 20mm cannon and two M18/M18A1 pod-mounted 7.62mm "Miniguns", or two XM159B/XM159C 19-tube 2.75 inch rocket launchers, and a chin-mounted 40mm automatic grenade launcher on the M5 armament subsystem.